Question

Write shear and moment equations for the beams in the following problems. In each problem, let x be the distance measured from the left end of the beam. 2000 lb 100 lb/ft B+ M - 4800 lb-ft M - 1200 lb ft E 3 B 3 ft 6 ft 3 ft Re Ro 2 ft 4 ft 80 KN → 10 kN/m w С 2 m 50 KN tre P.4 D 2 m Figure P-408

Answer 1

ovolo m=4800ft-lb А Rat R=2000 lb (-34 Git. 3ft- RA R$120. 2000(3) –4800 Ro=100 lb TRA=1900 lb take Section just Before D 2000lb 4800 ft-lb A -3Ft-to oft 'gh 1900gb Sheas. Ny = 1900 2000<-37 Moment My = 19000 2000<a-3).- 4800<a-9) Hote: Here < is singularity function value inside this is considered when it is positive other wise boly zero, SON 10 kN/m -2m -8m- RA • Rc RatRe = (10x19m) (is) +8040 PATR,= 180kN 80(2)+ 10(1)(2) - Relig) zo Re=SloGkN & Pa = 128.4 KN goku LOKN/m 128460 Shecy Vy 128.4 80232-239 lox Moment 2 My 128.40 - 80 <a-2) 10x² My = 128.40 - 8022-2) - S0²

loolb/h 1200lb-ft को A CI 2ft uft 78 RB HJE RE Efy_o Rot Re = 100 (6) = 600 lb EME=0 R8 (6) +1200 - 100 (6 (243) -0 IR₂=300db TRE=30006 100 lb/ft 120lbft -2ft. Si lood -uft pseudo My Vy lobebatt 300% -X from top and bottom bolu to balance Shear equation. Vy= 300 100x + 10o <ac-6 only valid when X>6h Moment equation Mys 300 (x-2) 100X + 120041774 10o <«-673 e My= 12000 P50x2 + 300<22> +50226)2
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